BASF Patents
Superhydrophilic Coatings
U.S. 8,568,834 B2
BASF has been awarded a patent for a
method for preparing a superhydrophilic
layer comprised of one or more metal
oxides on a substrate which method is
comprised of (a) first coating the substrate with a cationic polymer, followed
by (b) applying to the substrate coated
by the cationic polymer a suspension, in
a solvent, of amorphous particles of one
or more metal oxides selected from the
group consisting of oxides of silicon, zinc
and titanium, wherein the particles have a
particle diameter of from approximately
20 nm to 80 nm, to form a single layer
film; (c) cross linking the thus obtained
single layer film by applying a cross linking agent followed by drying to obtain a
precursor film; and then (d) calcining the
precursor film at temperatures ranging
from 400° C to 600° C for 1 to 8 hours.
Multi-Layered Coatings
U.S. 8,568,833 B2
Kansai Paint has been granted a patent for
a process for formation of a multi-layered
coating film, which sequentially is com-
prised of the following steps (1)-( 4): (1) a
step of coating an organic solvent-based
first colored coating composition (A) on
an object to be coated to form an uncured
first colored coating film, (2) a step of
coating an organic solvent-based second
colored coating composition (B) on the
uncured first colored coating film formed
in the step (1) to form an uncured second
colored coating film, ( 3) a step of coating
a clear coating composition (C) on the un-
cured second colored coating film formed
in the step (2) to form a clear coating film,
and ( 4) a step of heating the uncured first
colored coating film, the uncured second
colored coating film and the uncured
clear coating film formed in the steps (1)-
( 3) to cure these three films simultane-
ously; wherein the organic solvent-based
first colored coating composition (A) is
a coating composition containing (a1)
a polyester resin containing a hydroxyl
group, which contains a straight-chain
alkylene group having a carbon number
of 4 or more in the molecule in a con-
tent of 1.0-8.0 mol per 1 kg of a solid
content of the polyester resin (a1), has a
hydroxyl group value in a range of 30-
160 mgKOH/g and has a number-average
molecular weight in a range of 1,000-
6,000, and (a2) a melamine resin; and
the organic solvent-based second colored
coating composition (B) is a coating com-
position containing (b1) an acrylic resin
containing a hydroxyl group, which has
a hydroxyl group value in a range of 40-
200 mgKOH/g and has a weight-average
molecular weight in a range of 3,000-
15,000, (b2) a melamine resin having a
content rate of a mononuclear melamine
of 40 mass and (b3) an acid catalyst.
Nanovere Patents Dendritic
Polyurethane Coating
U.S. 8,568,888 B2
Nanovere has obtained a patent for a
surface-protective coating composition
comprised of a first component com-
prised of a globular dendritic polymer
having a peripheral cross-linkable hy-
droxyl functionality of approximately 32
to 64; optionally, an acrylic compound
having a peripheral cross-linkable hy-
droxyl functionality of 2 to 6; optionally,
a plurality of metal oxide nanoparticles
optionally encapsulated in a cross-link-
able hydroxyl functional polymer and/
or a cross-linkable hydroxyl functional
fluorosurfactant; optionally, a sterically
hindered amine light stabilizer; option-
ally, a UV absorber; a cross-linking cata-
lyst; and a first substantially anhydrous
solvent in which the above materials are
dissolved or, in the case of the nanopar-
ticles, are dispersed; and (2) a second
component comprised of a cross-linking
agent capable of reacting with hydroxyl
groups; and a second substantially anhy-
drous solvent which may be the same as
or different from the first substantially
anhydrous solvent, wherein the compo-
nents are mixed to form the coating.
AkzoNobel Patents Chip
Resistant Powder Topcoats
U.S. 8,574,708 B2
Akzo Nobel Coatings International has
been granted a patent for a chip-resistant
powder topcoat on a steel substrate having a corrosion resistant powder coating
basecoat thereon.
The topcoat is comprised of the cured
or fused product of a coating powder of
one or more resin component of one or
more toughened epoxy resin, from 0.1 to
5 parts per hundred parts resin (phr) of
one or more wax and from 75 phr to 200
phr of one or more extenders wherein the
one or more extenders is selected from
the group consisting of barium sulfate,
titanium dioxide, iron oxides, crystalline
silica (quartz), calcium metasilicate, soda
lime glass spheres, magnesium silicate,
nepheline syenite, muscovite mica, diatomaceous earth, kaolin clay and calcium
carbonate. CW
Reactive Surfaces Extends its Patent Protection in U.S. and
Middle East for Antimicrobial Coatings
Reactive Surfaces has been granted an additional U.S. patent covering its non-toxic
peptidic antimicrobial coatings. The claimed coatings comprise short polymers of
naturally-occurring amino acids. The patented compositions expand the peptide actives protected in antimicrobial ProteCoat coating compositions, alone and in cocktails of such peptides or traditional biocides. Toxicity studies of these actives suggest
that no EPA-mandated cautionary statements will be required.
